Toy block



FIG. 1 is a front, top and right side perspective view of a toy block showing our new design;

FIG. 2 is a left side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a toy block, as shown and described. 